Home / cs-notes / Language / Java / Basic / Problems / System properties vs environment variables

Addition

• sys prop
  • -Dname=value
• env var
  • win SET
  • *nix EXPORT

Retrival

• sys prop
  • System.getProperty(String): String
  • System.getProperty(): Properties
• env var
  • System.getenv(String): String
  • System.getenv(): Map<String, String>

Runtime manipulate

• sys prop
  • writable
    • System.setProperty
    • System.getProperties().load
• env var
  • read-only

Access

• sys prop
  • only current process
• env var
  • all processes on the machine

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